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Cadillac engine repair questions and answers

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  • greg
    greg - 2003 Cadillac DeVille - Engine - 2/25/2014
    How much does it cost to fix a egr vale
    my car keeps cutting off when i warm it up .i got po404 coad
     
    • Jimm
      2/25/2014 Jimm
      The parts are readily available from these many on-line sources, www.partsgeek.com, www.rockauto.com, www.discountautoparts.com, www.autopartswarehouse.com, www.jcwhitney.com - to list only a few possibilities.
      In fact, they (RockAuto) list the EGR valve from around $96.00 for your vehicle.

      You may chose to install the EGR valve yourself; www.autozone.com - for the directions. Recognize the part cost at $96.00 does not include any labor.
  • Steve
    Steve - 1996 Cadillac Eldorado - Engine - 2/25/2014
    The check engine light comes on when I accelerate the car hard or go up a hill. I get message that the emission system
    needs work and the car will begin to run rough. If I stop the car for ten minutes and restart the car, all the problems go away and the check engine light goes off the next day. Diagnosis of the check engine light revealed codes P1406, P0101, P1108.
     
    • Jimm
      2/25/2014 Jimm
      P1406 - indicates an EGR problem. Clean the EGR valve to remove dirt and carbon.

      P0101 - indicate an issue with the mass air flow sensor (MAF) - such as dirty or an air leak. Same recommendation - clean the MAF first.

      P1108 - BARO to MAP Sensor Comparison Too High

      In each case - use a mass air flow (MAF) spray cleaner to clean the mass air flow sensor. The EGR valve can be cleaned using carburetor / fuel system spray cleaner.
  • frank
    frank - 2004 Cadillac DeVille - Engine - 2/23/2014
    High idle occasionally
    my cadi, every now and then will idle very high, the other day it was holding 60mph on the highway with my foot off the gas pedal, and slowly rising. cruise control was off and only till i pulled over and shut off the car,then restarted it the idle was normal again. ...
     
    • HouseCallAuto
      2/23/2014 HouseCallAuto
      Check for a vacuum leak at the rubber boot that connects the intake manifold with the throttle body as they are known ffor splitting open on the bottom. You could confirm this by spraying water at this boot and listening for a change in the idle or even a stall out while spraying the water.
  • Cybage QA
    Cybage QA - 2007 Cadillac Escalade - Engine - 2/19/2014
    This is a testing question.
    testing question.
     
  • AutoMD Member
    AutoMD Member - 2003 Cadillac CTS - Engine - 2/8/2014
    2003 cts luxury sport- problem: zero power with jumper cables attached...hmmm
    I know i have a bad battery however when I first attached jumper cables the radio played amongst other accessories, tried to crank it twice. first nothing happened 2nd time everything cut out completely. all colored fuses checked out fine. What could of happened? I ...
     
    • Jimm
      2/8/2014 Jimm
      Check the battery cable connections as the first step - should not be loose or corroded - at either end of the positive or negative cable.
  • AutoMD Member
    AutoMD Member - 2003 Cadillac CTS - Engine - 2/8/2014
    2003 cts luxury sport- problem: zero power with jumper cables attached...hmmm
    I know i have a bad battery however when I first attached jumper cables the radio played amongst other accessories, tried to crank it twice. first nothing happened 2nd time everything cut out completely. all colored fuses checked out fine. What could of happened? I ...
     
    • Jimm
      2/8/2014 Jimm
      Check the battery cable connections as the first step - should not be loose or corroded - at either end of the positive or negative cable.
  • AutoMD Member
    AutoMD Member - 2003 Cadillac CTS - Engine - 2/7/2014
    2003 cts luxury sport- problem: zero power with jumper cables attached...hmmm
    I know i have a bad battery however when I first attached jumper cables the radio played amongst other accessories, tried to crank it twice. first nothing happened 2nd time everything cut out completely. all colored fuses checked out fine. What could of happened? I ...
     
    • HouseCallAuto
      2/7/2014 HouseCallAuto
      You have not mentioned whether you even checked the basics. The side terminal connections on GM vehicles have a tendency to sometimes corrode under the vinyl covers and this powder-like corrosion acts like a resistor and causes an open circuit even when the terminal is tight. So, confiorm that the terminals are clean and bright copper showing at the place oif contact to the lead face of the battery connection. Take the 5/16" bolt out of the terminal end (usually it is the positive that corrodes) and slip off the vinyl cover to make it easier to clean the terminals. After youi tell me you have confirmed that the battery connevction is good I will continue to advise you. And by the way, if this battery needs replacement, do so at the same time.
  • AutoMD Member
    AutoMD Member - 1999 Cadillac Eldorado - Engine - 2/7/2014
    Car will not start when you turn the key
    car will not start but when you bypass the starter relay it will start
     
    • HouseCallAuto
      2/7/2014 HouseCallAuto
      When you bypass the starter relay, I assume that the engine cranks and starts but stalls right away? If that is the case and you also have a security light illuminated on the dash, then your cause is a broken wire that leads to the ignition lock cylinder probably right at the rear of the lock cylinder. If you check fault codes there is probably a P1626 give or take a few digits at the end. There is a way to bypass this security system if you want to, just google "passkey bypass" or replace the lock cylinder in the column . The lock cylinder comes with the small gauge wires attached to it with a really tiny connector at the end.
  • AutoMD Member
     
  • CADI - MAN
    CADI - MAN - 2004 Cadillac CTS - Engine - 2/1/2014
    WHEN ACCELERATING I HEAR WHINNING SOUND COMING FROM THE THE ENGINE
    iT SEEMS IT IS ONLY HEARD FROM THE INSIDE WHILE DRIVING, POWER STEERING IS FINE. THE WHINNING STARTS AROUND 25 MPH AND CONTINUES THE DURATION OF THE DRIVE ABOVE 25 MPH. 76000 MILES NO ENGINE LIGHTS ON, NO BROKEN BELTS. TRANSMISSION DOES NOT SEEM TO BE LABORING.
     
    • Jimm
      2/1/2014 Jimm
      As a first step - raise the hood and with assistance (with the transmission in Park) observe for the sound at different engine speeds.

      Several possibilites; worn accessory / serpentine drive belt, worn / faulty belt tensioner, worn belt idler pulley, drive belt misalignment. The parts are readily available from these many on-line sources, www.partsgeek.com, www.rockauto.com, www.discountautoparts.com, www.autopartswarehouse.com, www.jcwhitney.com - to list only a few possibilities. For example, they (RockAuto) list the drive belts from around $8.00, the belt tensioner from around $28.00, the belt idler pulley from around $26.00 for your vehicle.
  • CADI - MAN
    CADI - MAN - 2004 Cadillac CTS - Engine - 2/1/2014
    WHEN ACCELERATING I HEAR WHINNING SOUND COMING FROM THE THE ENGINE
    iT SEEMS IT IS ONLY HEARD FROM THE INSIDE WHILE DRIVING, POWER STEERING IS FINE. THE WHINNING STARTS AROUND 25 MPH AND CONTINUES THE DURATION OF THE DRIVE ABOVE 25 MPH. 76000 MILES NO ENGINE LIGHTS ON, NO BROKEN BELTS. TRANSMISSION DOES NOT SEEM TO BE LABORING.
     
    • Jimm
      2/1/2014 Jimm
      As a first step - raise the hood and with assistance (with the transmission in Park) observe for the sound at different engine speeds.

      Several possibilites; worn accessory / serpentine drive belt, worn / faulty belt tensioner, worn belt idler pulley, drive belt misalignment. The parts are readily available from these many on-line sources, www.partsgeek.com, www.rockauto.com, www.discountautoparts.com, www.autopartswarehouse.com, www.jcwhitney.com - to list only a few possibilities. For example, they (RockAuto) list the drive belts from around $8.00, the belt tensioner from around $28.00, the belt idler pulley from around $26.00 for your vehicle.
  • AutoMD Member
    AutoMD Member - 1999 Cadillac DeVille - Engine - 1/24/2014
    Why does my car hesitate when I step on gas and miss?
    replaced plugs and wires and fuel filter ,air filter so far , noticeable knock when pressing on gas
     
    • HouseCallAuto
      1/23/2014 HouseCallAuto
      Read fault codes with a code reader. You can obtain a code reader from amazon the cheapest anywhere - $20 and reading the codes takes a minute. Consider replacing the two upstream oxygen sensors and check over very carefully for a vacuum leak.
    • Jimm
      1/24/2014 Jimm
      First step - have the stored fault codes or check engine light scanned - for free - at any local auto parts store; Advance Auto, Auto Zone, NAPA. Then, post a reply as 'add answer' with the specific code for more assistance. There may be a fault code stored in the OBD memory which may not be displayed as a check engine light.

      Possible Causes of Engine Hesitation or Stumble:

      Dirty fuel injectors (cleaning the injectors often fixes this)
      Dirty air filter (change filter)
      Dirty / clogged fuel filter (change filter)
      Bad MAP (manifold absolute pressure) sensor
      Bad TPS (throttle position) sensor
      Bad or dirty MAF (mass airflow) sensor
      Low fuel pressure (leaky fuel pressure regulator or weak fuel pump)
      Vacuum leaks (intake manifold, vacuum hoses, throttle body, EGR valve)
      Bad gasoline (fuel contaminated with water or too much alcohol)

      Sometimes, what feels like a hesitation is actually ignition misfire rather than lean misfire. The causes of ignition misfire may include:

      Dirty or worn spark plugs
      Bad plug wires
      Weak ignition coil
      Wet plug wires
  • AutoMD Member
    AutoMD Member - 1999 Cadillac DeVille - Engine - 1/20/2014
    What is wrong when dic message is: theft system not working, car may not start
    i turned the car off and it did restart. and mwssage has not reappeared
     
    • HouseCallAuto
      1/20/2014 HouseCallAuto
      In most cases it means that you need a new ignition lock cylinder. There is a bypass if you Google "PassKey bypass". It might not start at any time so do not ignore this message.
  • calvin roberson
    calvin roberson - 1998 Cadillac Eldorado - Engine - 1/15/2014
    I put a 1997 4.6 in my 98 cad same vin # s' same hook ups. now I have code p0340 cam shaft position sensor a circuit or
    single sensor. I replaced cam & both crank sensors trippled checked wireing verified all conunity & voltage checks ok put I still have same code. help
     
    • HouseCallAuto
      1/13/2014 HouseCallAuto
      Replace the ignition control module. I can tell you how to check and confirm this as your cause but unless you have a automotive lab scope to look at the waveforms you can't. That said, replace the ICM and this stands a high probability of a fix.
      HouseCallAuto
      1/15/2014 calvin roberson
      have replaced ICM ignition control mod 2x also replaced ecm electronic control mod (computer) 2x & had cad delear repogram service dept test said that computer malfunction need new one. the ones I have are remanutactory. I think they wanted more money. needless so say their estimate was more than cars worth.
    • HouseCallAuto
      1/15/2014 HouseCallAuto
      I assume that the engine still runs? You did not say.

      1. Using the labscope, check the crank and cam sensor signals making sure they are in sync with each other
      .
      2. If the cam and crank are out of sync, check to see if the timing chain has jumped on the cam sprocket or if the chain was installed incorrectly.

      If the cam and crank sensors are out of sync with each other, a code P0340 will set. When this happens, all the signals in from the sensors cam, crank sensor A, and B will be good, but there will be no output from the ignition module to the Powertrain Control Module (PCM) for the cam sensor.

  • AutoMD Member
    AutoMD Member - 2003 Cadillac CTS - Engine - 1/9/2014
    What does it cos to repair heating coil
    Car starts smoking when it warms up or I use my heat.
     
    • Jimm
      1/9/2014 Jimm
      The heater core part itself is inexpensive; around $43.00 from these many on-line sources, www.partsgeek.com, www.rockauto.com, www.discountautoparts.com, www.autopartswarehouse.com, www.jcwhitney.com - to list only a few possibilities.

      The expense will be to have the new heater core installed, try the 'Find-A-Shop' and 'Estimate Cost' resources on the AutoMD website.